iTunes

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Listen to music from a CD or your computer
Collect and organize your music in one place
Transfer music, videos, files, etc. from your computer to your iPod
Shop the iTunes store and purchase music, movies, tv shows, games, and more
Peruse the podcast area of the store for free podcasts to use in class or for professional development
Browse through the unbelievable amount of course offerings at iTunes U to add portable content to your courses or to learn more yourself